<![CDATA[Opera 26 - very slow scroll on some sites]]>Hi,
The Opera 26.0.1656.60 (extensions disabled) is very slow for example on this site: http://www.ubuntu.com/phone/carrier-advisory-group
The same with Chrome 39.0.2171.95 m but WebKit based too the Comodo Dragon 36.1.1.21 and Chromium Secure 36.1.1.3 are 3 times faster.
The Firefox 34.0.5 and IE 11 are lighting fast here.

My config:
Win7 SP1 x64, i7-950, 24 GBRAM, AMD HD6970

Opera GPU log:
Graphics Feature Status
Canvas: Hardware accelerated
Flash: Hardware accelerated
Flash Stage3D: Hardware accelerated
Flash Stage3D Baseline profile: Hardware accelerated
Compositing: Hardware accelerated
Multiple Raster Threads: Disabled
Rasterization: Software only, hardware acceleration unavailable
Threaded Rasterization: Enabled
Video Decode: Hardware accelerated
Video Encode: Hardware accelerated
WebGL: Hardware accelerated
Driver Bug Workarounds
clear_uniforms_before_first_program_use
exit_on_context_lost
scalarize_vec_and_mat_constructor_args
texsubimage2d_faster_than_teximage2d
Problems Detected
GPU rasterization is blacklisted on non-Android: 362779
Disabled Features: gpu_rasterization
Some drivers are unable to reset the D3D device in the GPU process sandbox
Applied Workarounds: exit_on_context_lost
TexSubImage2D() is faster for full uploads on ANGLE
Applied Workarounds: texsubimage2d_faster_than_teximage2d
Clear uniforms before first program use on all platforms: 124764, 349137
Applied Workarounds: clear_uniforms_before_first_program_use
Always rewrite vec/mat constructors to be consistent: 398694
Applied Workarounds: scalarize_vec_and_mat_constructor_args
Raster is using a single thread.
Disabled Features: multiple_raster_threads
Version Information
Data exported 12/27/2014, 2:31:30 PM
Chrome version OPR/26.0.1656.60
Operating system Windows NT 6.1 SP1
Software rendering list version 9.12
Driver bug list version 7.10
ANGLE commit id unknown hash
2D graphics backend Skia
Command Line Args Files (x86)\Opera\26.0.1656.60\opera.exe" --ran-launcher --alt-high-dpi-setting=96 --flag-switches-begin --save-page-as-mhtml --flag-switches-end --disable-direct-npapi-requests --enable-download-resumption --enable-proprietary-media-types-playback --with-feature:enhanced-autofill
Performance Information
Graphics 7.9
Gaming 7.9
Overall 7.5
Driver Information
Initialization time 78
Sandboxed false
GPU0 VENDOR = 0x1002, DEVICE= 0x6719
Optimus false
AMD switchable false
Desktop compositing Aero Glass
Driver vendor Advanced Micro Devices, Inc.
Driver version 14.501.1003.0
Driver date 11-20-2014
Pixel shader version 5.0
Vertex shader version 5.0
Machine model name
Machine model version
GL_VENDOR Google Inc.
GL_RENDERER ANGLE (AMD Radeon HD 6900 Series Direct3D11 vs_5_0 ps_5_0)
GL_VERSION OpenGL ES 2.0 (ANGLE 2.1.unknown hash)
GL_EXTENSIONS GL_OES_element_index_uint GL_OES_packed_depth_stencil GL_OES_get_program_binary GL_OES_rgb8_rgba8 GL_EXT_texture_format_BGRA8888 GL_EXT_read_format_bgra GL_NV_pixel_buffer_object GL_OES_mapbuffer GL_EXT_map_buffer_range GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_float GL_OES_texture_float_linear GL_EXT_texture_rg GL_EXT_texture_compression_dxt1 GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_EXT_sRGB GL_ANGLE_depth_texture GL_EXT_texture_storage GL_OES_texture_npot GL_EXT_draw_buffers GL_EXT_texture_filter_anisotropic GL_EXT_occlusion_query_boolean GL_NV_fence GL_EXT_robustness GL_EXT_blend_minmax GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_pack_reverse_row_order GL_OES_standard_derivatives GL_EXT_shader_texture_lod GL_EXT_frag_depth GL_ANGLE_texture_usage GL_ANGLE_translated_shader_source
Window system binding vendor Google Inc. (adapter LUID: 000000000000febf)
Window system binding version 1.4 (ANGLE 2.1.unknown hash)
Window system binding extensions EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_KHR_create_context
Direct rendering Yes
Reset notification strategy 0x8252
GPU process crash count 0
Diagnostics
0
b3DAccelerationEnabled true
b3DAccelerationExists true
bAGPEnabled true
bAGPExistenceValid true
bAGPExists true
bCanRenderWindow true
bDDAccelerationEnabled true
bDriverBeta false
bDriverDebug false
bDriverSigned false
bDriverSignedValid false
bNoHardware false
dwBpp 32
dwDDIVersion 11
dwHeight 1600
dwRefreshRate 60
dwWHQLLevel 0
dwWidth 2560
iAdapter 0
lDriverSize 1348928
lMiniVddSize 0
szAGPStatusEnglish Enabled
szAGPStatusLocalized Enabled
szChipType AMD Radeon Graphics Processor (0x6719)
szD3DStatusEnglish Enabled
szD3DStatusLocalized Enabled
szDACType Internal DAC(400MHz)
szDDIVersionEnglish 11
szDDIVersionLocalized 11
szDDStatusEnglish Enabled
szDDStatusLocalized Enabled
szDXVAHDEnglish Not Supported
szDXVAModes ModeMPEG2_A ModeMPEG2_C
szDescription AMD Radeon HD 6900 Series
szDeviceId 0x6719
szDeviceName \.\DISPLAY1
szDisplayMemoryEnglish 4095 MB
szDisplayMemoryLocalized 4095 MB
szDisplayModeEnglish 2560 x 1600 (32 bit) (60Hz)
szDisplayModeLocalized 2560 x 1600 (32 bit) (60Hz)
szDriverAssemblyVersion 14.501.1003.0
szDriverAttributes Final Retail
szDriverDateEnglish 11/21/2014 03:44:20
szDriverDateLocalized 2014-11-21 03:44:20
szDriverLanguageEnglish English
szDriverLanguageLocalized English
szDriverModelEnglish WDDM 1.1
szDriverModelLocalized WDDM 1.1
szDriverName aticfx64.dll,aticfx64.dll,aticfx64.dll,aticfx32,aticfx32,aticfx32,atiumd64.dll,atidxx64.dll,atidxx64.dll,atiumdag,atidxx32,atidxx32,atiumdva,atiumd6a.cap,atitmm64.dll
szDriverNodeStrongName oem11.inf:ATI.Mfg.NTamd64.6.1:ati2mtag_NICayman:14.501.1003.0:pci\ven_1002&dev_6719
szDriverSignDate
szDriverVersion 8.17.0010.1333
szManufacturer Advanced Micro Devices, Inc.
szMiniVdd n/a
szMiniVddDateEnglish n/a
szMiniVddDateLocalized n/a
szMonitorMaxRes
szMonitorName HP LP3065 Wide LCD Monitor
szNotesEnglish No problems found.
szNotesLocalized No problems found.
szOverlayEnglish Not Supported
szRankOfInstalledDriver 00E62001
szRegHelpText
szRevision
szRevisionId 0x0000
szSubSysId 0x0B001002
szTestResultD3D7English Not run
szTestResultD3D7Localized Not run
szTestResultD3D8English Not run
szTestResultD3D8Localized Not run
szTestResultD3D9English Not run
szTestResultD3D9Localized Not run
szTestResultDDEnglish Not run
szTestResultDDLocalized Not run
szVdd n/a
szVendorId 0x1002
Log Messages
GpuProcessHostUIShim: The GPU process exited normally. Everything is okay.

Best Regards, m-tron d3bil0x

]]>https://forums.opera.com/topic/7252/opera-26-very-slow-scroll-on-some-sitesRSS for NodeThu, 12 Mar 2026 17:59:58 GMTSat, 27 Dec 2014 17:10:26 GMT60<![CDATA[Reply to Opera 26 - very slow scroll on some sites on Tue, 30 Dec 2014 09:57:33 GMT]]>May be for a test a fresh Opera test profile may giv you more

  1. Open DOS box
  2. Start Opera by enetering the following command:
    "%ProgramFiles(x86)%\Opera\launcher.exe" --user-data-dir="%TEMP%\OPTEMP\
  3. Visit http://www.ubuntu.com/phone/carrier-advisory-group
  4. Set your zoom to desired value
  5. Scroll

If it is the same problem as before, you have a problem with your graphics card driver on Windows and not with your Opera profile.

]]>https://forums.opera.com/post/62830https://forums.opera.com/post/62830Tue, 30 Dec 2014 09:57:33 GMT<![CDATA[Reply to Opera 26 - very slow scroll on some sites on Mon, 29 Dec 2014 01:47:59 GMT]]>Sorry for the unexpected post layout.

This slowdown occurs when the page is zoomed.

]]>https://forums.opera.com/post/62727https://forums.opera.com/post/62727Mon, 29 Dec 2014 01:47:59 GMT<![CDATA[Reply to Opera 26 - very slow scroll on some sites on Sun, 28 Dec 2014 08:23:18 GMT]]>Website works fine here in Opera Developer. Turn off hardware acceleration and see if that helps.

]]>https://forums.opera.com/post/62654https://forums.opera.com/post/62654Sun, 28 Dec 2014 08:23:18 GMT